EFFECT OF THE CU-CU SUPEREXCHANGE ON THE STABILITY OF ZHANG-RICE SINGLETS

被引：6

作者：

BATISTA, CD ^{[1
]}

ALIGIA, AA ^{[1
]}

机构：

[1] INST BALSEIRO,RA-8400 BARILOCHE,RIO NEGRO,ARGENTINA

来源：

PHYSICAL REVIEW B | 1994年 / 49卷 / 22期

关键词：

D O I：

10.1103/PhysRevB.49.16048

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We solve exactly a Cu4O8 cluster with four and five holes, for parameters for which the low-energy physics of the three-band Hubbard model can be mapped exactly to a t-J model with J=0. When a Cu-Cu superexchange J is included the mapping is no more exact. We investigate the quality of the mapping and the amount of nonorthogonal Zhang-Rice singlets of each low-energy eigenstate as a function of J. We also explain briefly how to calculate a property of the three-band model (such as the Cu and O photoemission intensity) using the t-J model.

引用

页码：16048 / 16051

页数：4

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